نتایج جستجو برای: z h converter
تعداد نتایج: 677090 فیلتر نتایج به سال:
Let $G$ be a tamely ramified reductive $p$-adic group. We study distinction of a class of irreducible admissible representations of $G$ by the group of fixed points $H$ of an involution of $G$. The representations correspond to $G$-conjugacy classes of pairs $(T,phi)$, where $T$ is a tamely ramified maximal torus of $G$ and $phi$ is a quasicharacter of $T$ whose restriction t...
Background: Zataria multiflora Boiss. (Avishan-e Shirazi), as an Iranian endemic plant, belongs to the Lamiaceae family and may be used as a food preservative. This study aimed to detect potential genotoxic effects of Z. multiflora extract. Methods: Hydro-alcoholic extract of Z. multiflora was prepared. Human B lymphocytes were treated with 1% extract within 3 and 24 h. Sterile Phosphate Buff...
فرض کنیم g یک گروه متناهی باشد. (g) را مجموعه مرتبه عناصر g قرار می دهیم. (g) زیر مجموعه ای از z+ است که تحت بخش پذیری بسته می باشد. حال فرض کنیم t z+ تحت بخش پذیری باشد، h(t) را تعداد کلاس های یکریختی از گروههایی مانند g تعریف می کنیم بطوریکه = (g). برای داده شده، ممکن است گروهی مانند g موجود نباشد که (g)= بنابراین 0<h( )، ولیکن برای گروه دا...
This paper presents the design and analysis of a T-Connected autotransformer based 36-pulse ac-dc converter which supplies direct torque controlled induction motor drives (DTCIMD’s) in order to have better power quality conditions at the point of common coupling. The proposed converter output voltage is accomplished via two paralleled 18-pulse ac-dc converters. An autotransformer is designed to...
This paper presents a Selective Harmonic Elimination-PWM technology (SHE-PWM) employing H-Bridge multilevel inverter configuration. In this method variable DC voltage is used and the lower order harmonics are eliminated, without affecting the structure of the inverter. This method gives constant switching angle, so it reduces the number of steps required for offline calculation. The proposed me...
In the last decades, the increasing restrictions imposed on the exhaust emissions from internal combustion engines have given a strong impulse toward the development of electric propulsion systems for automotive applications. The goal of electric and hybrid vehicles is the reduction of global emissions and global warming which in turn leads to a decrease of fuel resources exploitation. In this ...
Space Vector Modulation (SVM) Technique has become the most popular and important PWM technique for three phase Voltage Source Inverters. Z-Source Inverters have the ability to boost the dc link voltage, thus increasing the output ac voltage beyond the values reached by conventional inverters. The enhanced ratio from ac output voltage to dc link voltage is possible due to an impedance network c...
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